Source: U.S.
Census Bureau population estimates.*Data from the Center for Disease Control's National Center for Health Statistics were used for 1999-00 births and deaths and 2009-10 births and deaths because the Census Bureau does not release birth or death statistics in Census years. These two years include births and deaths between Jan. 1 and Dec. 31, whereas the other years include births and deaths from July 1 to July 1.